if (document.images) {
                  m1on = new Image(95,20);
                  m1on.src = "images/m1on.gif";    /* company */
                  m2on = new Image(85,20);
                  m2on.src = "images/m2on.gif";    /* products */
                  m3on = new Image(117,20);
                  m3on.src = "images/m3on.gif";    /* services */
                  m4on = new Image(88,20);
                  m4on.src = "images/m4on.gif";    /* contact */

                  m1off = new Image(95,20);
                  m1off.src = "images/m1off.gif";
                  m2off = new Image(85,20);
                  m2off.src = "images/m2off.gif";
                  m3off = new Image(117,20);
                  m3off.src = "images/m3off.gif";
                  m4off = new Image(88,20);
                  m4off.src = "images/m4off.gif";
			
                  m1active = new Image(60,420);
                  m1active.src = "images/iconclear.gif"; /* holder */
                  m2active = new Image(60,420);
                  m2active.src = "images/iconclear.gif"; /* holder */
                  m3active = new Image(60,420);
                  m3active.src = "images/iconclear.gif"; /* holder */
                  m4active = new Image(60,420);
                  m4active.src = "images/iconclear.gif"; /* holder */

                  sm1on = new Image(85,22);
                  sm1on.src = "images/sm1on.gif";    /* geneflow */
                  sm2on = new Image(85,20);
                  sm2on.src = "images/sm2on.gif";    /* qtlocate */
                  sm3on = new Image(85,58);
                  sm3on.src = "images/sm3on.gif";    /* phenomap */

                  sm1off = new Image(85,22);
                  sm1off.src = "images/sm1off.gif";
                  sm2off = new Image(85,20);
                  sm2off.src = "images/sm2off.gif"
                  sm3off = new Image(85,58);
                  sm3off.src = "images/sm3off.gif";
                  
                  sm1active = new Image(60,420);
                  sm1active.src = "images/sm1active.gif";    /* icon1 */
                  sm2active = new Image(60,420);
                  sm2active.src = "images/sm2active.gif";    /* icon2 */
                  sm3active = new Image(60,420);
                  sm3active.src = "images/sm3active.gif";    /* icon3 */
			iconclear =  new Image(60,420);
			iconclear.src = "images/iconclear.gif";    /* holder */
                  }

var holder=document.getElementById("holder");

function img_act(imgName) {
    if (document.images) {
    document[imgName].src = eval(imgName + "on.src");
	document["holder"].src = eval(imgName + "active.src");
    }
}

function img_inact(imgName) {
    if (document.images) {
    document[imgName].src = eval(imgName + "off.src");
	document["holder"].src = "images/iconclear.gif";
    }
}